<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>点击</button>
    <button>点击</button>
    <button>点击</button>
    <script>
        var o = {
            name:'andy'
        }
        function fn(a,b){
            console.log(this);
            console.log(a+b);
        }
        var f = fn.bind(o,1,2);
        f();
        // var btn = document.querySelector('button');
        // btn.onclick = function(){
        //     this.disabled = true;
        //     setTimeout(function(){
        //         this.disabled = false;
        //     }.bind(this),3000);
        // }
        var btns = document.querySelectorAll('button');
        for(var i=0;i<btns.length;i++)
        {
            btns[i].onclick = function(){
                this.disabled = true;
                setTimeout(function(){
                    this.disabled = false;
                }.bind(this),2000);
            }
        }
    </script>
</body>
</html>